| Titles |
|
English :
|
Risks of prolonged drainage water use in clay soils in north delta, Egypt
|
|
Arabic :
|
مخاطر استخدام مياه الصرف لفترة طويلة فى الاراضى الطينية بشمال الدلتا فى مصر
|
|
| Abstract |
Two clay soils differed in their irrigation water resources were chosen and wheat (Sakha 61 variety) was planted during 2002/2003 season. The first soil (soil 1) usually irrigated with Nile water, while the second (soil 2) located in the terminal end of irrigation canal and irrigated with drainage water 10 years ago. The objectives were subjected to look upon and evaluate the effects of long-term irrigation with marginal drainage water on some soil chemical and physical proprieties, wheat growth, yield and heavy metals content of soil and wheat plants.
The obtained results showed that long-term reuse of marginal drainage water in irrigating (soil 2) resulted in a remarkable increase in soil salinity and sodicity as compared to soil 1. These values slightly increased more after wheat harvest than before planting. Total water stable aggregates (TWSA) > 0.25 mm, mean weight diameter (MWD), optimum size of aggregation (OSA %), structure coefficient (SC) and aggregation index (AI) were lower in soil (2) than soil (1) before planting. These values decreased after wheat harvest and the reduction was more pronounced in soil (2). DTPA-extractable micro-nutrients (Fe, Mn and Cu) and heavy metals (Pb, Cd and Ni) recorded higher values in soil (2) than soil (1) before wheat planting and slightly increased in soil (2) after wheat harvest.
Data also showed that wheat growth parameters and yield component such as number of tillers, number of spikes, maximum growth dry weight, biological yield, straw yield, grain yield/plant were markedly reduced in soil (2). The heavy metals (Fe, Mn, Cu, Pb, Cd and Ni) content (mg/kg dry matter) of wheat straw and grains increased in soil (2) than soil (1) and were higher in straw than grains. Special soil and water management practices should be followed when the farmers were obliged to reuse marginal drainage water for irrigation to reduce the hazard effects on soil, plant growth, yield quantity and quality, as well as, mankind health
|
| Publication year |
2004
|
| Availability location |
Soils, Water and Environment Research Institute, ARC
|
| Availability number |
|
| Organization Name |
Soil, Water and Environment Research Institute (SWERI)
|
| Author(s) from ARC |
|
| Agris Categories |
Drainage
|
AGROVOC
TERMS |
Clay soils.
Drainage water.
Water reuse.
Wheats.
|
| Publication Type |
Journal
|